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UDDEHOLM ARNE®
SS-EN ISO 9001SS-EN ISO 14001
This information is based on our present state of knowledge and is intended to provide generalnotes on our products and their uses. It should not therefore be construed as a warranty ofspecific properties of the products described or a warranty for fitness for a particular purpose.
Classified according to EU Directive 1999/45/ECFor further information see our “Material Safety Data Sheets”.
Edition 7, 09.2012
The latest revised edition of this brochure is the English version,which is always published on our web site www.uddeholm.com
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PropertiesPhysical dataHardened and tempered to 62 HRC. Data atambient temperature and elevated tempera-ture.
Temperature 20°C 200°C 400°C(68°F) (375°F) (750°F)
Density kg/m3 7 800 7 750 7 700 lbs/in3 0.282 0.280 0.278
Modulus of elasticity N/mm2 190 000 185 000 170 000 kp/mm2 19 500 19 000 17 500 tsi 12 500 12 200 11 200 psi 28 x 106 27 x 106 25 x 106
Coefficient ofthermal expansion per °C from 20°C – 11.7 x 10-6 11.4 x 10-6
per °F from 68°F – 6.5 x 10-6 6.3 x 10-6
Thermal conductivity W/m °C 32 33 34 Btu in/ft2 h °F 222 229 236
Specific heat J/kg C 460 – – Btu/lb. °F 0.11 – –
GeneralUddeholm Arne general purpose oil-hardeningtool steel is a versatile manganese-chromium-tungsten steel suitable for a wide variety ofcold-work applications. Its main characteristicsinclude:
• good machinability
• good dimensional stability in hardening
• a good combination of high surface hardnessand toughness after hardening and tempering
These characteristics combine to give a steelsuitable for the manufacture of tooling withgood tool life and production economy.
Uddeholm Arne can be supplied in variousfinishes including hot-rolled, pre-machined,fine-machined and precision ground. It is alsoavailable in the form of hollow bar.
Compressive strength
The figures are to be considered approximate.
Compressive strengthHardness Rm Rc0.2
HRC N/mm2 N/mm2
62 3000 220060 2700 215055 2200 180050 1700 1350
Clipping and edging tool in Uddeholm Arne tool steelto clip and form edge of 0.914 mm (0.036") thickstainless steel container approx. 254 x 152 x 203 mm(10" x 6" x 8").
Applications
Typical C Si Mn Cr W Vanalysis % 0.95 0.3 1.1 0.45 0.45 0.1
Standardspecification AISI O1
Deliverycondition Soft annealed approx. 190 HB
Colour code Yellow
Tools for Material thickness HRC
CuttingBlanking, punching, up to 3 mm (1/8") 60–62piercing, cropping, 3– 6 mm (1/8–1/4") 56–60shearing, trimming 6–10 mm (1/4–13/32") 54–56clipping
Short cold shears 54–60
Clipping and trimming tools Hot 58–60for forgings Cold 56–58
FormingBending, raising, drawing, rim rolling,spinning and flow forming 56–62
Small coining dies 56–60
Gauges, measuring toolsTurning centresGuide bushes, ejector pins, high duty,small/medium drills and tapsSmall gear wheels, pistons, nozzles, cams 58–62
UDDEHOLM ARNE
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SurfaceTemp. of Holding time hardness prior
Austenitizing martempering in martemp. to tempering temperature bath bath (obtained by°C °F °C °F minutes martempering)
825 1520 225 435 max. 5 64±2 HRC825 1520 200 390 max. 10 63±2 HRC825 1520 180 355 max. 20 62±2 HRC850 1560 225 435 max. 10 62±2 HRC
Heat treatmentSoft annealingProtect the steel and heat through to 780°C(1435°F). Then cool in the furnace at 15°C(27°F) per hour to 650°C (1200°F), then freelyin air.
Stress-relievingAfter rough machining the tool should beheated through to 650°C (1200°F), holdingtime 2 hours. Cool slowly to 500°C (930°F)then freely in air.
HardeningPreheating temperature: 600–700°C (1110–1290°F)Austenitizing temperature: 790–850°C (1450–1560°F)
Temperature Soaking* time Hardness before°C °F minutes tempering
800 1470 30 approx. 65 HRC825 1520 20 approx. 65 HRC850 1560 15 approx. 63 HRC
* Soaking time = time at austenitizing temperature after the tool is fully heated through
Protect the part against decarburization andoxidation during hardening.
Quenching media• Oil• Martempering bath. Temperature 180–225°C
(360–435°F), then cooling in air
Note: Temper the tool as soon as its tempera-ture reaches 50–70°C (120–160°F).
TemperingChoose the tempering temperature accordingto the hardness required by reference to thetempering graph. Temper twice with intermedi-ate cooling to room temperature. Lowesttempering temperature 180°C (360°F). Hold-ing time at temperature minimum 2 hours.
Grain sizeASTM10
8
6
4
2
760 780 800 820 840 860 880 °C1400 1435 1470 1510 1545 1580 1615 °F
Austenitizing temperature
Hardness, HRC
66
64
62
60
14
12
10
8
6
4
2
Hardness, HRC Retained austenite %
66
64
62
60
58
56
54
52
50
48
46
44
42
40
38
36
MartemperingTools at austenitizing temperature are im-mersed in the martempering bath for the timeindicated, then cooled in air to not lower than100°C (210°F). Temper immediately as withoil-quenching.
Austenitizing temperature
Retained austenite850°C (1560°F)
820°C(1510°F)
790°C(1455°F)
TEMPERING GRAPH
100 200 300 400 500 600 700°C 212 392 572 752 932 1112 1292°F
Tempering temperature
Holding time 60 min.
Grain size
Retained austenite
Holding time20 min.
HARDNESS AS A FUNCTIONOF HARDENING TEMPERATURE
1
Restaustenit, %
40
30
20
10
Above tempering curves are obtained after heat treatment ofsamples with a size of 15 x 15 x 40 mm, quenched in oil.Lower hardness can be expected after heat treatment oftools and dies due to factors like actual tool size and heattreatment parameters.
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Width Length Thickness% % %
Oil hardening from830°C (1530°F) min. +0.03 +0.04 –
max. +0.10 +0.10 +0.02
Martempering from830°C (1530°F) min. +0.04 +0.06 –
max. +0.12 +0.12 +0.02
Dimensional changes duringhardeningSample plate, 100 x 100 x 25 mm, 4" x 4" x 1"
Note: The dimensional changes on hardeningand tempering should be added together.Recommended allowance 0.25%.
Dimensional change %
+0.1
0
-0.1
-0,2100 200 300 °C
200 400 600 °F
Tempering temperature
Sub-zero treatment and agingPieces requiring maximum dimensional stabilityshould be sub-zero treated and/or artificiallyaged, as volume changes may occur in thecourse of time. This applies, for example, tomeasuring tools like gauges and certain struc-tural components.
SUB-ZERO TREATMENT
Immediately after quenching the piece shouldbe sub-zero treated to between -70 and -80°C(-95 to -110°F), soaking time 3–4 hours,followed by tempering or aging. Sub-zero treat-ment will give a hardness increase of 1–3 HRC.
Avoid intricate shapes as there will be risk ofcracking.
AGEING
Tempering after quenching is replaced byageing at 110–140°C (230–285°F). Holdingtime 25–100 hours.
Blanking tool made from fine-machinedUddeholm Arne tool steel.
Dimensional changes duringtemperingSample plate, 100 x 100 x 25 mm, 4" x 4" x 1"
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Soft annealed HardenedType of grinding condition condition
Face grindingstraight wheel A 46 H V A 46 H V
Face grinding segments A 24 G V A 36 G V
Cylindrical grinding A 46 L V A 60 K V
Internal grinding A 46 J V A 60 I V
Profile grinding A 100 L V A 120 J V
MachiningrecommendationsThe following tables give machining data forUddeholm Arne in soft annealed condition.Hardness 190 HB. The data are to be consid-ered as guiding values, which must be adaptedto existing local conditions.
Turning
Turning with carbide Turningwith high
Cutting data speed steelparameters Rough turning Fine turning Fine turning
Cutting speed(vc)
m/min 160–210 210–260 20–25f.p.m. 525–690 690–850 65–80
Feed (f) mm/r 0.2–0.4 0.05–0.2 0.05–0.3 i.p.r. 0.008–0.016 0.002–0.008 0.002–0.01
Depth of cut (ap)mm 2–4 0.5–2 0.5–3inch 0.08–0.2 0.02–0.08 0.02–0.10
Carbidedesignation ISO P20–P30 P10 —
Coated Coatedcarbide carbide or
cermet
END MILLING
Type of milling
CarbideCutting data Solid indexable High speedparameters carbide insert steel
Cutting speed(vc) m/min 150–190 160–220 25–301)
f.p.m. 490–620 525–720 80–1001)
Feed (fz)mm/tooth 0.03–0.22) 0.08–0.22) 0.05–0.352)
inch/tooth 0.0012–0.0082) 0.003–0.0082) 0.002–0.0142)
Carbidedesignation
ISO K20, P40 P20–P30 —
1) For coated end mills vc = 45–50 m/min. (150–160 f.p.m.)2) Depending on radial depth of cut and cutter diameter
DrillingHIGH SPEED STEEL TWIST DRILL
GrindingGeneral grinding wheel recommendation forUddeholm Arne is given below. More informa-tion can be found in the Uddeholm publication“Grinding of Tool Steel”.
MillingFACE AND SQUARE SHOULDER MILLING
Milling with carbideCutting dataparameters Rough milling Fine milling
Cutting speed (vc)m/min 170–250 250–290f.p.m. 560–820 820–950
Feed (fz)mm/tooth 0,2–0,4 0,10–0,2inch/tooth 0.008–0.016 0.004–0.008
Depth of cut (ap)mm 2–5 –2inch 0.08–0.2 –0.08
Carbide designationISO P20–P40 P10–P20
Coated carbide Coated carbideor cermet
Drill diameter Cutting speed (vc) Feed (f)mm inch m/min f.p.m. mm/r i.p.r.
– 5 –3/16 15–17* 49–56* 0.08–0.20 0.003–0.008 5–10 3/16–3/8 15–17* 49–56* 0.20–0.30 0.008–0.01210–15 3/8–5/8 15–17* 49–56* 0.30–0.35 0.012–0.01415–20 5/8–3/4 15–17* 49–56* 0.35–0.40 0.014–0.016
* For coated HSS drills vc = 26–28 m/min. (85–90 f.p.m.)
CARBIDE DRILL
Type of drill
Taladro conCutting data Indexable Solid Brazedparameters insert carbide carbide1)
Cutting speed(vc) m/min 200–220 110–140 70–90 f.p.m. 655–720 360–460 230–295
Feed (f)mm/r 0.05–0.252) 0.10–0.253) 0.15–0.254)
i.p.r. 0.002–0.012) 0.004–0.013) 0.006–0.014)
1) Drill with replaceable or brazed carbide tip2) Feed rate for drill diameter 20–40 mm (0.8”–1.6”)3) Feed rate for drill diameter 5–20 mm (0.2”–0.8”)4) Feed rate for drill diameter 10–20 mm (0.4”–0.8”)
UDDEHOLM ARNE
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ARNE
CALMAX
CALDIE (ESR)
RIGOR
SLEIPNER
SVERKER 21
SVERKER 3
VANADIS 4EXTRA
VANADIS 6
VANADIS 10
VANADIS 23
VANCRON 40
Further informationPlease contact your local Uddeholm office forfurther information on the selection, heattreatment, application and availability of Udde-holm tool steel.
MATERIAL PROPERTIES AND RESISTANCE TO FAILURE MECHANISMS
Electrical-dischargemachiningIf spark-erosion, EDM, is performed in thehard-ened and tempered condition, the toolshould then be given an additional temper atapprox. 25°C (50°F) below the previoustempering temperature.
WeldingGood results when welding tool steel can beachieved if proper precautions are takenduring welding (elevated working temperature,joint preparation, choice of consumables andwelding procedure). If the tool is to bepolished or photo-etched, it is necessary towork with an electrode type of matchingcomposition.
Relative comparisonof Uddeholm cold work tool steel
Welding Working Hardnessmethod temperature Consumables after welding
MMA 200–250°C AWS E312 300 HB(SMAW) ESAB OK
84.52 53–54 HRCUTP 67S 55–58 HRCCastolin
EutecTrode 2 54–60 HRCCastolin
EutecTrodeN 102 54–60 HRC
TIG 200–250°C AWS ER312 300 HBUTPA 67S 55–58 HRC
UTPA 73G2 53–56 HRCCastoTig 4
5303W 60–64 HRC
Hardness/ Resistance to Fatigue cracking resistanceResistance Ductility/ Toughness/
Uddeholm to plastic Machin- Grind- Dimension Abrasive Adhesive resistance to grossgrade deformation ability ability stability wear wear chipping cracking
UDDEHOLM ARNE
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The Conventional Tool Steel ProcessThe starting material for our tool steel is carefully selected fromhigh quality recyclable steel. Together with ferroalloys and slagformers, the recyclable steel is melted in an electric arc furnace.The molten steel is then tapped into a ladle.
The de-slagging unit removes oxygen-rich slag and after the de-oxidation, alloying and heating of the steel bath are carried out inthe ladle furnace. Vacuum degassing removes elements such ashydrogen, nitrogen and sulphur.
In uphill casting the prepared moulds are filled with a controlledflow of molten steel from the ladle. From this, the steel goesdirectly to our rolling mill or to the forging press to be formedinto round or flat bars.
HEAT TREATMENT
Prior to delivery all of the different bar materials are subjected toa heat treatment operation, either as soft annealing or hardeningand tempering. These operations provide the steel with the rightbalance between hardness and toughness.
MACHINING
Before the material is finished and put into stock, we also roughmachine the bar profiles to required size and exact tolerances.In the lathe machining of large dimensions, the steel bar rotatesagainst a stationary cutting tool. In peeling of smaller dimensions,the cutting tools revolve around the bar.
To safeguard our quality and guarantee the integrity of the toolsteel we perform both surface- and ultrasonic inspections on allbars. We then remove the bar ends and any defects found duringthe inspection.
UDDEHOLM ARNE
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ROLLING MILL
FORGING
ELECTRIC ARCFURNACE
STOCK
MACHINING
HEAT
TREATMENT
UPHILL CASTING
UDDEHOLM ARNE
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www.assab.com www.uddeholm.com
Network of excellenceUDDEHOLM is present on every continent. This ensures you
high-quality Swedish tool steel and local support wherever you
are. ASSAB is our wholly-owned subsidiary and exclusive sales
channel, representing Uddeholm in the Asia Pacific area.
Together we secure our position as the world’s leading supplier
of tooling materials.
UD
DEH
OLM
120901.200/ STROKIRK KN
APPEN
K120055
UDDEHOLM is the world’s leading supplier of tooling materials. This
is a position we have reached by improving our customers’ everyday
business. Long tradition combined with research and product develop-
ment equips Uddeholm to solve any tooling problem that may arise.
It is a challenging process, but the goal is clear – to be your number one
partner and tool steel provider.
Our presence on every continent guarantees you the same high quality
wherever you are. ASSAB is our wholly-owned subsidiary and exclusive
sales channel, representing Uddeholm in the Asia Pacific area.
Together we secure our position as the world’s leading supplier of
tooling materials. We act worldwide, so there is always an Uddeholm
or ASSAB representative close at hand to give local advice and support.
For us it is all a matter of trust – in long-term partnerships as well as in
developing new products. Trust is something you earn, every day.
For more information, please visit www.uddeholm.com, www.assab.com
or your local website.
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